The first attempt to sink a ship with a submarine fails. Still, the blockade of New York is weakened by another example of Yankee ingenuity. The Kids, thinking they’re reporting on the sighting of a “sea monster” in New York harbor, instead meet David Bushnell, the father of the submarine.

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Liberty's Kids is the animated adventures of two teenage reporters as they cover the events of the Revolutionary War for Ben Franklin’s newspaper, The Philadelphia Gazette.